Automatic train-stop.



C. W. WILSON.

AUTOMATIC TRAIN STOP.

APPLICATION FILED AUG. 17. m5.

Patented Dec. 26, 1916.

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AUTOMATIC TRAIN-STOP.

Specification of Letters Patent. Patented Dec. 26, 1916.

Application filed August 17, 1915. Serial No. 45,894.

To all whom it may concern:

Be it known that I, CHARLnsW. WILSON, citizen of the United States, residing at Berea, in thecounty of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Automatic Train- Stops, of which the following is a specification.

This invention relates to devices for automatically stopping a railway train, of that class embodying a ramp which under certain track conditions operates a trip lever to open a train pipe and set the brakes. The ramp is electrically controlled, by means of a magnet which is preferably connected in circuit with the railway signal system, so that when the switch or the like is open the ramp will be set to stop the train.

The object of the invention is to provide improved means for operating the brake valve under such conditions.

The invention is illustrated in the accompanying drawing in which I Figure 1 is a side elevation of a locomotive and track provided with the device. Fig. 2 is an enlarged side elevation of the mechanism. Fig. 3 is a section on the line 83 of Fig. 2.

The locomotive is shown provided with the air brake train line or pipe 6, having a bleeding valve 7 which is normally closed, but which is opened by the action of the track devices to set the brakes. This valve is operated by a trip lever 8 which is fulcrumed at 9 to a bracket 10 on the engine and is connected at its upper end by a pivoted link 11 to a crank arm 12 on the stem of the valve. At its lower end the lever has an offset foot 13 to strike the ramp.

The ramp consists of two links 14: pivoted at 15 to brackets 16 on the ties 17, and connected at their lapped ends by a pin 18 which works in a slot 19 in one of the links, to allow the same to lift. The lift is effected by means of a cam 20 mounted on a shaft 21 supported by brackets 22 on the side of one ofthe ties 17. The shaft 21 has a crank arm 23 connected by a link 24 to the core or plunger 25 of the solenoid or electromagnet 26 which, as stated, is preferably in circuit with the electric signal system.

I In operation, when the magnet is energized it attracts its plunger or armature,

thereby rocking the shaft 21 and causing the cam 20 to lift the ramp links to the'position shown in dotted lines in Fig. 2. This action will be effected upon the opening of a switch, or under other abnormal track con ditions. When the ramp is lifted it will extend into the path of the foot 13 on the lever 8 carried by an approaching locomotive, and will rock said lever, as shown in dotted lines in Fig. 2, thereby opening the train line and setting the brakes. To reset or release the operating devices the en ineer must leave the cab and restore the trip lever by hand and also, if a lock switch is used, unlock the switch and break the circuit, permitting the ramp to drop.

The apparatus may be used in connection with any of the known electrical signal systems, and can be easilyand cheaply installed in connection therewith.

The invention is not limited to the exact details shown and described, particularly with respect to the location of the trip lever 8 and bracket 10 on the engine, but various modifications may be made within the scope of said invention.

The valve 7 is located at a level not lower than that of the train pipe of the air brake system, thereby to prevent the accumulation of water of condensation in or around the valve, and thus prevent freezing of the valve under low temperatures.

What I claim as new is:

1. The combination with an air brake system, of a valve included in the train pipe of said system, an upright trip lever fulcrumed between its ends, a link end of the lever, and a the valve and the link.

2. The combination with an air brake sys-' connection between tem, of a turning valve included in the train pipe of said system at a level not lower than that of the train pipe of the system, an upright trip lever fulcrumed between its ends, a link at the upper end of the lever, and a crank arm for the turning valve and con-' nected to the link.

at the upper 3. The combination with an air-brake.

train line, and a turning valve therein havmg a pro ecting operating arm, of a toggle comprising an upright trip lever and a link,

the link being connected to said arm and the In testimony whereof, I do affix my signalever being pivoted between its ends to swing ture in presence of two Witnesses. and flex the toggle in either direction upon CHARLES W. WILSON.

contact of the lower end of the lever with Witnesses: 5 a track deV1ce, Whe reby the Valve is turned AUGUs'r E. GEIGER,

the same Way in either instance. CHAS. EVANS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. I 

